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- JavaScript
- CoffeeScript
- Ruby
- Haskell
- Java
- Python
- C#
- TypeScript
- C++
- Scala
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- Julia (Beta)
- Kotlin
- Go
- Groovy
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- Prolog (Beta)
- Swift
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- C
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- COBOL (Beta)
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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.